CHONDRICHTHYES
Description: Sharks, skates, and rays are the members of this class. These fish have a flexible skeleton made of cartilage. Chondrichthyes lack scales, swim bladder (a balloon like organ that helps fish float present in bony fish).  These animals are fast swimmers, and when they are not moving they sink to the bottom of the ocean.  They also lack the operculum; therefore they need to swim all the time to breathe.

Examples
1. Blue-spotted stingray - Taeniura Lymma
2. Great White - Carcharodon Carcharias